Investigation of passenger car using Macpherson strut for suspension system pt.1: Vehicle behaviour variation of time response

Ali, Tanti; Bakar, Rosli Abu; Meng, Gan Leong; Jafar, Zarina Amat · 2017 · Crossref

DOI: 10.1051/matecconf/20179001072

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Summary

This study investigates the dynamic behavior of a passenger car equipped with a MacPherson strut front suspension system under various driving maneuvers. The research aims to understand how suspension systems influence vehicle handling and ride comfort by analyzing time-response variations during acceleration, deceleration, cornering, and traversal of uneven road surfaces. The motivation stems from the critical role of suspensions in isolating occupants from road-induced shocks while maintaining tire contact for stability and control. The experimental design utilized a Proton Persona Sedan 1.6 Manual Transmission, featuring a MacPherson strut front suspension and a multi-link rear suspension. Data were collected using a DEWESoft data acquisition system integrated with sensors including accelerometers, GPS, gyroscopes, and tire slip angle sensors. The study conducted four primary tests, each repeated five times for consistency. Acceleration tests were performed on paved and unpaved roads at target speeds of 0–60 km/h and 0–90 km/h (paved) and 0–40 km/h and 0–60 km/h (unpaved). Deceleration tests involved braking from 90 km/h to 0 km/h on paved roads and from 65 km/h to 0 km/h on unpaved roads. Cornering tests were executed at constant speeds of 25, 40, and 50 km/h on roundabouts with varying diameters. Bumpy tests assessed suspension response at constant velocities of 30, 40, and 50 km/h over uneven surfaces. Results indicated distinct time-response patterns corresponding to each maneuver. Velocity increased during acceleration and decreased during deceleration, with the longest deceleration time observed on off-road conditions due to tire slip. During cornering, the vehicle maintained a constant speed while direction changed, demonstrating the suspension's role in sustaining traction and wheel alignment. The bumpy tests revealed that the suspension mechanism effectively cushioned road irregularities, supporting vehicle weight while dissipating energy to minimize oscillation. The study confirmed that the MacPherson strut system significantly affects both vehicle behavior and ride comfort, though it highlighted the inherent conflict between optimizing ride comfort and handling performance. The findings conclude that the MacPherson strut suspension is effective in managing dynamic loads and improving passenger comfort by absorbing road-induced vibrations. However, the trade-off between ride comfort and handling stability remains a challenge in suspension design. The authors suggest that future research should focus on optimizing MacPherson strut behavior to balance these conflicting requirements across all driving conditions, potentially enhancing overall vehicle performance and safety.

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• passenger motion sickness comfort